A.sheepskin lovely long white
B.long lovely white sheepskin
C.lovely long sheepskin white
D.lovely long white sheepskin

A.More
B.The more
C.The most
D.The much

A.are preventing
B.can prevent
C.prevent
D.can be prevented

A.occasion
B.fortune
C.chance
D.outlook

A.4,02.
B.4,20.
C.4,26.
D.6,03.

A.Polietilen.
B.Poliisopren.
C.Poliacrilonitrin.
D.Poli(vinyl clorua).

A.3
B.4
C.5
D.6

A.Anilin.
B.Alanin.
C.Lysin.
D.Glyxin.

A.Glucozơ.
B.Saccarozơ.
C.Xenlulozơ.
D.Amilozơ.

A.Axit axetic.
B.Axit acrylic.
C.Axit benzoic.
D.Axit stearic.